[Rudolf]

http://www.cooler.it/
Primerno v seredine stranithi

[Rudolf]

Sorry, eto ia k 1033

[igor.gm]

Eto byly proba. Vse mozhno seret.

Apple Studio Display 17" MO: M6496




QUESTION NO. P62502-10: LG795SC monitor FCC BEJCB790 has shorted Q514, 515, 516, 531 & D528. Flyback checks out at 34.6KV, not sure about IC501 but has 1K. Resistor at J80 link and link where R555 (1K?) should be according to my schematics. Is this assembly incorrect or is there a mod it just means that the spark gap has no resistance from the flyback point? This is the basic version or early version to the LG made Apple Studio Display M6496 17 inch.
That HV level is excessive; it should be about 26KV in this LG model. A bad flyback (6174Z-1024B or Y265382) can cause excess HV in this LG; the HV adjust is at VR501.





QUESTION NO. P50902-4: Apple Studio Display 17 [M6496]. A standard fault in this monitor seems to be that something arches (assumingly within the flyback) that can go on for a while until it blows up other parts and the monitor stops working. I`ve got a bundle of these monitors that have stopped working. What other parts (apart from the flyback) should be replaced? When repaired by Apple their list of replaced parts show a diode, a rectifier diode RL2, an 18 Volts zener diode of type MTZJ18, a 2K resistor, the 2SJ306 MOSFET and the flyback (6174T-13003C or 6174Z-1024B or Y2653820). The 2K resistor is easy to find as there`s only one on the print (R555), the flyback and the MOSFET are also obvious but where are the other parts (what are their part numbers)?
Besides the flyback, check FET`s Q503 = 2SJ306 and Q507 = 2SK2847. D502 is an 18V zener such as you have described, used for gate protection on Q503, but also check D505, the diode off the gate of Q507. The D503, off the drain of Q503, is either RL2 or RL2A (Sanken ultrafast types); double check your exact type, as RL2A is rated at 600V, 1.1 Amps, but RL2 is only rated for 350V. Also check IC501, Q203, Q204, R547 (47 ohm), and the small diode connecting to R555, which is D532 (similar in specs to 1N4448).



FBT: http://www.donberg.ie/descript/h/hr46162.htm
Tak vygljadit Monitor: http://www.neiparts.com/cmparts/brand/apple/imac.php

BOBAN: http://conf.web.vist-v.ru/cgi2/conf.cgi?conf=monitor&pg=1&action=view&bid=961354460